JCR-704: Enable maven-source-plugin
JCR-704: Enable maven-source-plugin

The source plugin is automatically enabled in release mode by the new parent POM.

git-svn-id: 02b679d096242155780e1604e997947d154ee04a@790568 13f79535-47bb-0310-9956-ffa450edef68

bartosz-grabski/jackrabbit,sdmcraft/jackrabbit,sdmcraft/jackrabbit,SylvesterAbreu/jackrabbit,tripodsan/jackrabbit,bartosz-grabski/jackrabbit,sdmcraft/jackrabbit,afilimonov/jackrabbit,afilimonov/jackrabbit,SylvesterAbreu/jackrabbit,Overseas-Student-Living/jackrabbit,Kast0rTr0y/jackrabbit,Kast0rTr0y/jackrabbit,tripodsan/jackrabbit,kigsmtua/jackrabbit,afilimonov/jackrabbit,Overseas-Student-Living/jackrabbit,Overseas-Student-Living/jackrabbit,kigsmtua/jackrabbit,Kast0rTr0y/jackrabbit,kigsmtua/jackrabbit,SylvesterAbreu/jackrabbit,bartosz-grabski/jackrabbit,tripodsan/jackrabbit